Sewage Disposal and Management


 
 
Concept Explanation
 

Sewage Disposal and Management

Why Sewage should be Treated ?

We know that the amount of freshwater is declining day by day. The demand of water has increased due to steep rise in the population. Due to this, extreme scarcity of water occurs and many people in our country do not even get sufficient drinking water. In villages, sometimes villagers have to collect water from long distances to fulfill their needs.

They spend several hours in a day, just to collect a small quantity of water. Many people draw out underground water by digging bore wells. Due to continuous use, underground water is also not easily available. One has to dig deep bore wells to reach the water table. This is because the groundwater is not sufficiently replenished with rainwater because of the excessive construction of roads, buildings and pavements. Therefore, there is a need to make waste water or sewage fit for reuse. It must be cleaned thoroughly so that it can be reused. The purification of dirty waste water is carried out in sewage or wastewater treatment plant.

There are different systems of sewage treatment and maintenance .

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Sample Questions
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Question : 1

Which of the following are possible advantages of using bacteria in sewage treatment ?

  1. Bacteria multiply quickly, thus producing a cheap and abundant source of enzymes.
  2. Only one type of bacteria is required to provide the various enzymes necessary for different kinds of wastes.
  3. Bacteria can break down waste under anaerobic or aerobic condition.
Right Option : B
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Question : 2

Municipality system of sewage treatment have ________________  plants connected to them. 

Right Option : A
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Question : 3

The Municipality have sewage treatment plants connected to them The plants remove about 90% of ____________________  present in the sewage.

Right Option : A
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